I live in Lancashire, well known for its hot dry climate! I LIE lancashire is well known for its damp atmosphere most of the time. I drive a mk1 Vito that is Ravenna in colour, described as "peach" or the day after a bad (good) curry. Or at least it should be yellow(ish) in colour, actually its a mix of green and black algae (plus some moss) and a smattering of fungus. If I park for more than a week, it discolours with organic life (everything does here) ..... I've never come across anywhere as bad as it is in this specific locale. Any ideas what will shift it, unfortunately I have extreme problems with my health and almost everything esp common cleaners and chemicals so tcut etc are out of the question.